Disappearing contents of ActiveXWrapper_Acrobat on resize

When I resize the frame containing the ActiveXWrapper_Acrobat demo, the
pdf contents get refreshed as the size is being altered, but on release,
the ActiveX window is always a grey blank. (Using Acrobat 5.0, wxPython
2.3.3.1 and Windows 2000). Similarly, if the control is partially obscured
by another Window and then revealed, the obscured section remains greyed
out. The corresponding ActiveXWrapper_IE demo works fine, resizing etc. -
until I use it to open a pdf document and then I get similar behaviour to
the above. Does everyone else see the same and if so, any clues about its
cause?

Regards,

David Hughes
Forestfield Software Ltd
www.forestfield.co.uk